The antediluvians may have been breeding hybrids, but not with apes:
“1 And it came to pass, when men began to multiply on the face of the earth, and daughters were born unto them,
2 That the sons of God saw the daughters of men that they were fair; and they took them wives of all which they chose.
3 And the Lord said, My spirit shall not always strive with man, for that he also is flesh: yet his days shall be an hundred and twenty years.
4 There were giants in the earth in those days; and also after that, when the sons of God came in unto the daughters of men, and they bare children to them, the same became mighty men which were of old, men of renown.” Genesis 6:1-4
I disagree that sons of God were angels. I think they were simply followers of God and sons of men were men of this world, non-followers like secularists or atheists.